$-\theta$
$\sin(-\theta)=-\sin\theta$ $\cos(-\theta)=\cos\theta$ $\tan(-\theta)=-\tan\theta$
$\theta+\frac{\pi}{2}$
$\sin(\theta+\frac{\pi}{2})=\cos\theta$ $\cos(\theta+\frac{\pi}{2})=-\sin\theta$ $\tan(\theta+\frac{\pi}{2})=-\frac{1}{\tan\theta}$
$\theta+\pi$
$\sin(\theta+\pi)=-\sin\theta$ $\cos(\theta+\pi)=-\cos\theta$ $\tan(\theta+\pi)=\tan\theta$
$\frac{\pi}{2}-\theta$
$\sin(\frac{\pi}{2}-\theta)=\cos\theta$ $\cos(\frac{\pi}{2}-\theta)=\sin\theta$ $\tan(\frac{\pi}{2}-\theta)=\frac{1}{\tan\theta}$
$\pi-\theta$
$\sin(\pi-\theta)=\sin\theta$ $\cos(\pi-\theta)=-\cos\theta$ $\tan(\pi-\theta)=-\tan\theta$
$\theta=$$\frac{\pi}{3}$
弧度法
最大値
最小値
再生スピード 0.2× 0.5× 1× 2× 5×
再生方向
残像を消去 1つ消去 すべて消去